June weather forecastGrantham, Jamaica
June
Weather in June
June, the first month of the summer in Grantham, is still a hot month, with an average temperature fluctuating between 23°C (73.4°F) and 30.8°C (87.4°F).Temperature
Grantham's weather in June, with an average high-temperature of a still tropical 30.8°C (87.4°F), subtly shifts from May's 30.3°C (86.5°F). Grantham's average low-temperature during June nights is observed to be a warm 23°C (73.4°F).Heat index
For June, the heat index is computed to be a blistering 40°C (104°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
In Grantham, Jamaica, the average relative humidity in June is 79%.Rainfall
In Grantham, in June, it is raining for 20.5 days, with typically 84mm (3.31") of accumulated precipitation. In Grantham, during the entire year, the rain falls for 265.1 days and collects up to 806mm (31.73") of precipitation.Daylight
With an average of 13h and 12min of daylight, June has the longest days of the year.On the first day of the month, sunrise is at 05:30 and sunset at 18:40. On the last day of June, in Grantham, sunrise is at 05:35 and sunset at 18:47 EST.
Sunshine
In June, the average sunshine in Grantham is 10.1h.UV index
The months with the highest UV index in Grantham are May through August and October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 7 during June leads to these instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Grantham, Jamaica
- Average high temperature in June: 30.8°C
The warmest months (with the highest average high temperature) are July and August (31.7°C).
The month with the lowest average high temperature is January (28.4°C).
- Average low temperature in June: 23°C
The month with the highest average low temperature is August (23.8°C).
The coldest month (with the lowest average low temperature) is January (20.5°C).
Average pressure in June
Grantham, Jamaica
- Average pressure in June: 1014.1mbar
The month with the highest atmospheric pressure is January (1015.5mbar).
The month with the lowest atmospheric pressure is October (1011.5mbar).
Average wind speed in June
Grantham, Jamaica
- Average wind speed in June: 9km/h
The windiest month (with the highest average wind speed) is June (9km/h).
The calmest month (with the lowest average wind speed) is November (6.6km/h).
Average humidity in June
Grantham, Jamaica
- Average humidity in June: 79%
The months with the highest relative humidity are October, November and December (81%).
The months with the lowest relative humidity are March, July and August (77%).
Average rainfall in June
Grantham, Jamaica
- Average rainfall in June: 84mm
The wettest month (with the highest rainfall) is October (123mm).
The driest month (with the least rainfall) is January (26mm).
Average rainfall days in June
Grantham, Jamaica
- Average rainfall days in June: 20.5 days
The month with the highest number of rainy days is October (26.5 days).
The month with the least rainy days is February (19.2 days).
Average daylight in June /
Average sunshine in June
Grantham, Jamaica
- Average daylight in June: 13h and 12min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in June: 10h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in June
Grantham, Jamaica
- Average sunshine days in June: 3.5 days
The month with the most sunshine days is January (6 days).
The month with the least sunshine days is October (1.5 days).
Average UV index in June
Grantham, Jamaica
- Average UV index in June: 7
The months with the highest UV index are May, June, July, August and October (UV index 7).
The months with the lowest UV index are January, February, March, April, September, November and December (UV index 6).
Average cloud cover in June
Grantham, Jamaica
- Average cloud cover in June: 38
The month with the most cloud cover is June (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in June
Grantham, Jamaica
- Average visibility in June: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
